10/26/2026
Sound is a building system — and most walls are designed to fail at it.
STC (Sound Transmission Class) measures a wall's ability to stop sound from passing through it. Hitting a high STC isn't about one product; it's an assembly: decoupled framing, the right insulation, resilient channel, sealed penetrations, and staggered or double layers of board all working together. Miss one, and the whole rating drops.
In hotels, offices, healthcare, and multifamily, a wall that leaks sound is a wall that generates complaints for the life of the building.
WCP builds acoustic assemblies to the tested detail — not to 'close enough.' Because you can't caulk your way out of a bad STC.